Assigxob to the



(No Model.)

W. RICHARDSON.

DUST COLLECTOR.

No. 327,825. Patented Oct. 6, 1885,

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N. PETERS. Pm

turn STATES PATENT OFFICE.

\VILLIAM RICHARDSON, OF MILWAUKEE, WVISCONSIN, ASSIGNOR TO THE MILWAUKEE DUST COLLECTOR MANUFACTURING COMPANY, OF

SAME PLACE.

DUST-COLLECTO R.

SPECIFICATION forming part of Letters Patent No. 327,825, dated October 6,1885.

Application filed February 25, 1885. Serial No. 156,975.

To all whom it may concern.-

Be it known that I, WILLIAM Rronnnnson, of Milwaukee, in the county of Milwaukee, and'in the State of Wisconsin, have invented certain new and useful Improvements in Dust- Collectors; and I do hereby declare that the followingis a full, clear, and exact description thereof.

My invention relates to dust-collectors, and is an improvement in dust-collectors substantially such as that shown in Letters Patent granted to Faustin Prinz on the 20th day of February, 1883, Nos. 272,473 and 272,474. In the machine described in said Letters Patent the dust-collector consists of radiallyarranged sections forming a drum or balloon, the radial walls of which are of cloth adapted to permit the passage of air, which in its passage is strained or freed from its dust. The center of the balloon is open, and the purified air is discharged therefrom. The balloon revolves with a step-by-step motion, each step being equal to the inner peripheral width of the section. Thus the sections are brought in succession under a chamber or tube extending through the center of the balloon, said chamber having a slotted bottom and an airtight top, with suitable packing, so that as each section is arrested under the chamber it is isolated from the other sections of the balloon. This chamber being in communication with the atmosphere permits the outside air to be drawn through the tube and each isolated section, and thence back through the sections not isolated and out through the open center of the balloon to the open air through the suction-fan. By this construction a reverse current is induced through each section as it is isolated, which current dislodges the dust adhering to the cloth.

The object of my present invention is to obtain a stronger current than has heretofore been obtainable in the devices covered by the patents above referred to; and to this end my invention consists in devices for forcing a positive reverse current through the slotted air-chamber and the cloth of the section or (No model.)

sections of the balloon isolated therewith Without interfering with the main current through the other sections, aswill be fully described hereinafter.

In the drawings, Figure 1 is a vertical transverse section through a Prinz dust-collector, with my device shown in dotted lines thereon. Fig. 2 is an elevation of one end of a Prinz dust-collector with my device attached. Fig. 3 is a section on line X X, Fig. 2.

A is the balloon, which is inclosed in a suitable housing, A. B is the chamber for the reverse current. C is a suctionfamwhich is carried by a shaft, 0. B is a tube that leads from one end of the chamber B down beneath the fan and up again on the outside of it, that portion lying parallel and adjacent to the outer face of the fan being open, so that as the fan revolves in its casing D a portion of the air drawn through the balloon will be driven through the tube B into the chamber B, and thence through slot 1) in the bottom of chamber B into and through the cloth of the isolated section a of the balloon and out into the housing, from whence to be withdrawn by the fan through the cloth of the sections not isolated. Thus I am enabled, without any greater expenditure of power than formerly, to produce a reverse current sufliciently strong to free the cloth of each isolated section of all adhering matter, however tenacious.

I do not limit myself to the precise con struction of any of the features of my attachment, as they may be varied in many ways without departing from the spirit of my invention.

I propose, ordinarily, to use a fan on each end of the machine; but in case I find it expedient to take the reverse current from only one fan I may shut off the other by means of a valve or damper.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination, in a suitable casing, of a dust-collecting balloon provided with aslotted tube or chamber, a fan connecting with the have hereunto set my hand, at Milwaukee, in ba1loon-center for exhausting therefrom, and the county of Milwaukee and State of Wisa fan connected to said slotted chamber, isocousin, in the presence of two witnesses.

lating the sections and adapted to force air WILLIAM RICHARDSON. 5 through said isolated sections, as and for the Witnesses:

purpose set forth. S. S. STOUT,

In testimony that I claim the foregoing I H. G. UNDERWOOD. 

